NEW JERSEY: Cory Booker made it official Saturday and jumped into the Senate special election to replace the late Sen. Frank Lautenberg. Ex-Sen. Bill Bradley introduced Booker.

But Democrats don’t plan to make his life easy. Buzzfeed: “New Jersey Democrats involved in and following the race to fill the late Sen. Frank Lautenberg say the Newark mayor is the clear favorite, but that his opponents will work to expose a number of weak points in his narrative to take down the national political celebrity.”

(But here’s the thing: They have ONLY two months to do this, given that the Dem primary will take place in August.)

Star Ledger: “Assembly Speaker Sheila Oliver (D-Essex) [Sunday night] became the fourth major Democrat to throw herself into the race for U.S. Senate.”

VIRGINIA: The investigation into Gov. Bob McDonnell (R) expands. “A Virginia state delegate has confirmed that he’s been called to appear next month as a witness before a federal grand jury as part of an investigation related to Gov. Robert F. McDonnell,” The Washington Post reports.